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本文从异质产品的微观层面研究了技术改进的市场竞争效应随着竞争产品上市时间的变化趋势和竞争效应的细分市场边界。通过对中国乘用车市场13900个有效样本的经验研究得到结论如下。(1)市场竞争效应促进了产品的技术改进,但是竞争产品差异性越大其市场竞争效应越弱,市场竞争效应随着竞争产品上市后的时间呈现先增强后减弱的趋势。(2)汽车市场竞争效应在竞争车型上市以后2年才充分显现出来,近2年上市、排量在上下20%区间内的车型带来的市场竞争效应最为明显。(3)上述细分市场边界内近2年上市车型数量每增加1%通过竞争效应会促进车型的能源节约技术提升0.028%~0.14%。(4)技术水平越低的产品通过市场竞争效应改进的效果越明显。进一步用索洛余值、考虑到样本差异的实证检验结果支持了上述研究结论的稳健性。
In this paper, we study the market segmentation effect of technological improvement from the microcosmic level of heterogeneous products with the changing trend of competitive products’ time to market and the segmentation boundary of competitive effects. Through the empirical study of 13,900 valid samples in China’s passenger car market, the conclusions are as follows. (1) The market competition effect promotes the technological improvement of products, but the greater the difference of competitive products is, the weaker its market competition effect is. The market competition effect tends to increase first and then weaken with the time of listing of competitive products. (2) The competitive effect of the automobile market was fully revealed 2 years after the listing of competing models. The market competition effect brought by the vehicles with displacement ranging from 20% up and down in the last two years was the most obvious. (3) Every 1% increase in the number of vehicles listed in the past two years within the above market segments boundary. The energy saving technologies for vehicles will be promoted by competition effect by 0.028% -0.14%. (4) The lower the technical level of the product through the market competition effect to improve the effect of the more obvious. Further use of the Solow residuals, the empirical test taking into account the sample differences supports the robustness of the above findings.